Jack-car.



J. K. FURST.

JACK CAR.

APPLICATION FILED MAR-12,1917.

Patented Dec. 18,1917.

3 SHEETS-SHEET l- I I l 4' INVENTOH WITNESSES J. K. FURST.

JACK CAR.

APPHCATION FILED MAR-12. 19H.

Patented Dec. 18, 1917.

3 SHEETS-SHEET 3.

'in the details of construction,

with

nnrrnn STA JOHN K BURST, OF NEW CASTLE, PENNS- ES Parana? OFFICE.

YLVANIA, ASSIGNOR T0 PENNSYLVANIA YENNSYLVANIA.

JACK-CAB.

Specification of Letters Patent.

Application flied March 12, 1917. Serial No. 154,236.

To all whom it-n'iay concern:

Be it knownixtnat l, dorm K. Fons'r, acitizen of the United States, residing at New Castle, Lawrence county, Pennsylvania, have invented a mew and useful Improvemei'l't in- Jaclts of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in.which-- Figure 1 is a plan view, with a portion broken away, of a jack car embodying my invention."

Fig. 2 is a. section on the line ll ll of Fig. 1.

Fig. 3 is an end elevation of a car, also illustrating, in dotted lines, one use to which the car is specially adapted, and

Y Fig. 4 is a detail view of one form of slip gear which may be employed.

My invention has relation to jack cars, and is designed to provide a jack car of simple, convenient, strong, and serviceable character, capable of handling heavy loads, and which is adapted for a variety of purposes.

The nature of my invention will be best understood by reference to the accompanying' drawings, in which I have shown the preferred embodiment thereof, and which will now be described, it being premised, however, that various changes can be made arran gem out and combination. of the several parts with out departing from the spirit and scope of my invention as defined in the appended claims.

In these drawings the numeral. 2 designates the wheels, 3 the truck frame, and a the platform j o f a movable car, which may be in general of any usual or suitable con struction.

The platform i is provided with a central hollow cylindrical post 5 rising therefrom and on which is revolnhly mounted a sleeve member 6. This' sleeve member is'pro idod a bottom flange 7 having bevel gear teeth -8 which are adapted to mesh with the corresponding teeth of a pinion 9 can ricd by a shaft 16 adapted to be driven through suitablegear 11 by apinion on the armature shaft of an electric motor 13. This motor is shown as mounted upon one end portion of the platform 4. The sleeve member 6 at its upper portion is provided platform arranged below with a nut 1 fixedly secured thereto and having its thread engaging the thread of a vertically movable lifting screw. 15. The screw 15 has revolubly mount-ed upon its upper end portion a load-carrying plate 1.6. Preferably, ball bearings 17 are interposed between the plate 16 and the upper end of the screw and also between the lower end of the on the platform l. 18 designates a working the load-carrying plate 16, and to which the latter is connected by the depending struts or columns 19. The platform 18 has the depending skirt portion 20 which surrounds the sleeve member b, and which, when the parts are in their lowered position, rests upon the car platform at. This skirt portion 20 is cut away at one side, as shown at .21 to receive the motor 13 and the driving gear therefrom to the sleeve member 6. As the platform 18, together with the load-carrying plate 16 may be turned to a considerable extent when raised, in which case the cut away portion 21 would not register with the motor and driving connections when the parts are again lowered, I provide the platform l with the raised and curved guard member 22'. If the parts are lowered after having been rotated, the uncut-away portion of the shirt 30 will contact with this guard member, thus preventing injury to the mol'orand gearing, and causing the platform to be turned until the cutaway portion is brought intopropcr position to fit down over the factor and gearing. designates a dirt protecting casing for the bevel gear ing, and 24 is an inclosing casing'for the lower part of the screw 15. This casing 2% will preferably be filled with a suitable lubricant.

25 is a key gaging a vertical key-way in the screw to prevent turning of the latter.

The operation will be readily understood. hen the motor 13 is energized, the sleeve mciul'icr 5 and nut 1st are thereby rotated, causing the screw 15 to move u'pivar'ly or downwardly, according to the direction of rotation, and thereby raising or lowering the loadrarrying plate 16 and the working platform 18.

In Fig. 3 l have illustrated one of the ark car is well adapted;

uses to which the 1 712., the putting in place and removal of carried by the post 6 and ena converter bottom A. This bottom is placed tieally movable screw post actuated by the upon the load-carryin plate 16 and is raised nut, a motor and gearing for actuating the into position and he d by the jack while nut, a load-carrying plate rotatably mounteing secured in place. In work of this ed on the screw, and a working platform character it is desirable to provide some suspended from the load-carrying plate, said means whereby the upward movement of the platform having 21 depending skirt proload-earrying plate may be automatically vided with a cut away portion adapted to checked before too great pressure is brought fit over the nut actuating connections, subupon theconverter bottom and converter. stantially as described.

While it is desirable that the converter bot- 4. The combination of a movable car, 9, tom should be pressed firmly to its seat nut rotatably mounted on said car, a vertiagainst the converter, yet undue pressure cally movable screw post actuated by the must, of course, be prevented. This may nut, a motor and gearing for actuating the be accomplished by providing one of the nut, a load-carrying plate rotatably mounta gear members between the motor armature ed on the screw, and a working platform 6'5 and the gear flange 7 with any suitable slip suspended from the load-carrying plate, said connection with its shaft. In Fig. 4 I have platform having a depending skirt pro shown the gear member 11 as having a split vided with a cut away portion adapted to hub portion. 11 Which can be clamped with fit over the nut actuating connections, to-

any desired degree of pressure upon the gether with a guard member carried by the 70 shaft 10. If this pressure is exceeded, the ear and arranged to guide the parts in their gear will automatically slip on the shaft, lowering movements, substantially as deand thus prevent further upward movement scribed. of the screw 15 and the parts actuated 5. A movable car, a nut carrying member thereby. I rotatably mounted on said car, a vertically 75 'My invention prov-ides a jack car adaptmovable screw arrangd to be actuated by ed to the handlingof heavy loads. This the nut, a motor and gearing for actuatcar is simple in construction, and may be ing the nut, said gearing having .a sli simply and conveniently operated. member, a load carrying plate rotatably I claim: mounted on the scre and a working platso 1. A movable car, a nutcarrying member form arranged below and movable with the rotatably mounted on said car, a verticall lo d carrying plate, substantially as demovable screw arranged to be actuated by C i the. nut, a load-carrying plate rotatably G. The combination of a movable car, a mounted on the screw, and a working platvertical bearing thereon, a sleeve mounted 85 form arranged below and movable with the on said. bearing and carrying a bevel gear load-carrying plate, substantially as deing and a nut, a driving motor and gear conscribed. i motions for said sleeve and nut, a vertically 2. A movable car, a nut-carrying member movable screw extending through said sleeve 40 rotatably mounted on said car, a vertically member, nut and bearing, a load-carrying 90 movable screw arranged to be actuated by plate revolubly mounted on said screw, and the nut, a load-carrying plate rotatably a working platform suspended from said mounted on the screw. and a working platplate, substantially as described.

form arranged below and movable with the In testunony whereof, I have hereunto load-carrying plate, there being a plurality set my hand.

of load-distributing struts or posts connect 7 ing the load-carrying plate and the plat- JOHN FURST' form, substantially as described. Witnesses;

3. The combination of a movable car, a LEE E. ALLEN,

.50 nut rotatably mounted on said car, a ver- WM. J. Halo. 

